Topic
Cortical bundle
About: Cortical bundle is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 61 citations.
Papers
TL;DR: The vascular anatomy of the node and flower of Hoppea dichotoma of the family Gentianaceae has been studied and four inversely oriented cortical bundles in the regions of the angles are studied.
Abstract: In the present work, the vascular anatomy of the node and flower of Hoppea dichotoma of the family Gentianaceae has been studied. The quadrangular stem contains an amphiphloic siphonostele and four inversely oriented cortical bundles in the regions of the angles. In the nodal region each cortical bundle joins a lateral bundle arising from the single proximal leaf trace to form a plexus. From the plexus, in each corner of the stem arise: (a) a normally oriented lateral trace supplying a lateral vein of a leaf, (b) a single strand which quickly forks to form two of the four inversely oriented cortical bundles of the axillary shoot, and (c) a third strand which continues upward as one of the four inversely oriented cortical bundles in the internode above. The floral pedicel is similar to the stem in its quadrangular cross-sectional outline and in the possession of four inversely oriented cortical bundles and an amphiphloic siphonostele. A single trace, associated with a gap, diverges from the stele to each s...
5 citations
TL;DR: Two xeric adaptations in cacti—a broad nutrient-poor cortex and a tough hypodermis—probably are effective defenses, but Ligaria cuneifolia overcomes these defenses with unusual methods of attack and endophytic growth, although the host (Corryocactus brevistylus) responds strongly.
Abstract: Parasitic plants must be adapted to their hosts, and hosts must have ineffective defenses. Two xeric adaptations in cacti—a broad nutrient-poor cortex and a tough hypodermis—probably are effective defenses. However, Ligaria cuneifolia overcomes these defenses with unusual methods of attack and endophytic growth, although the host (Corryocactus brevistylus) responds strongly. Ligaria cuneifolia induces conversion of thick-walled host hypodermis cells to cork cambium, creating a vulnerable area of parenchyma; it induces formation of new vascular bundles and production of wood in host leaf/bud traces and cortical bundles. The endophyte remains compact, confined near the host surface, it never reaches the host stele. Its interface with the host consists of cytoplasmic parenchyma cells and rare vessels; the endophyte appears to lack sieve tube members. Responses by C. brevistylus include: cortex cells near haustoria (but not near endophytes) produce bark, other cortex cells collapse, and although L. ...
3 citations
TL;DR: Longitudinal conduction of water and nutrients probably occurs predominantly in stem wood, with cortical bundles maintaining the broad, voluminous cortex, the outer part of which is the plant's photosynthetic tissue and the inner part ofWhich stores water and starch.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2015 | 1 |
| 1992 | 1 |
| 1973 | 1 |